Derivative Financial Instruments - Additional Information (Detail) - USD ($) |
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Derivative [Line Items] | ||
| Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Amount | $ 500,000,000.0 | |
| Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | $ 5,300,000 | |
| Weighted-average strike rate for outstanding interest rate caps | 4.04% | |
| Number of Foreign Currency Derivatives Held | 0 | 0 |
| Approximate credit exposure related to swaps with bank customers | $ 39,600,000 | |
| Cash collateral on deposit with other financial institutions | 20,400,000 | |
| Interest rate swaps with upstream financial institution counterparties [Member] | ||
| Derivative [Line Items] | ||
| Approximate credit exposure related to swaps with bank customers | 12,600,000 | |
| Designated as Hedging Instrument [Member] | Financial Institution Counterparties Securities Interest Rate Swaps Assets | ||
| Derivative [Line Items] | ||
| Forward Contracts – Assets Notional Amount | $ 500,000,000 | $ 0 |
| Derivative, Fixed Interest Rate | 3.53% |
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- Definition Weighted Average Strike Rate Outstanding Interest Rate Caps No definition available.
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- Definition Carrying amount as of the balance sheet date of cash collateral held for borrowed securities, for which the cash is restricted as to withdrawal or usage. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Nominal or face amount used to calculate payments on the derivative asset. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Fixed interest rate related to the interest rate derivative. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of asset hedged in portfolio layer hedging relationship, expected to be remaining at end of hedging relationship. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Number of foreign currency exchange rate derivatives held by the entity at the reporting date. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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